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<p>Electromagnetic powder warm compaction technology can further improve the forming quality of powder bodies. The warm compaction characteristics of copper powders were studied through experiments and simulations. Results showed that the spring back position of the stress wave was located at the radial quarter. The maximum values of equivalent stress and strain were located at the upper edge, while the minimum values occurred at the lower edge. The relative densities of the compacts at 150&#xa0;°C and 200&#xa0;°C were 98.49%, and 98.73%, respectively. As the compaction temperature increased, the compressive strength first increased and then decreased. The maximum compressive strength was 513.28&#xa0;MPa at the 150&#xa0;°C. The relationship between the compressive strength and the compaction temperature was established. The pores on the end face of the compacts gradually disappeared, and the powder particles underwent intense squeezing layering. The optimal compaction temperature for copper powders was 150&#xa0;°C.</p> Graphical abstract <p></p>

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Experimental and numerical investigation of warm compaction characteristics of copper powders prepared by electromagnetic impacting

  • 期刊论文

  • 发表日期：

    2026年8月3日

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  • Xinyi Wan,
  • Dongying Dong,
  • Zhaozhou Cai,
  • Zhou Wang,
  • Xu Zhang,
  • Guangyao Li,
  • Junjia Cui

摘要

Electromagnetic powder warm compaction technology can further improve the forming quality of powder bodies. The warm compaction characteristics of copper powders were studied through experiments and simulations. Results showed that the spring back position of the stress wave was located at the radial quarter. The maximum values of equivalent stress and strain were located at the upper edge, while the minimum values occurred at the lower edge. The relative densities of the compacts at 150 °C and 200 °C were 98.49%, and 98.73%, respectively. As the compaction temperature increased, the compressive strength first increased and then decreased. The maximum compressive strength was 513.28 MPa at the 150 °C. The relationship between the compressive strength and the compaction temperature was established. The pores on the end face of the compacts gradually disappeared, and the powder particles underwent intense squeezing layering. The optimal compaction temperature for copper powders was 150 °C.

Graphical abstract